Hi I just got the 02 model with the 3.0l the persone I got it from said he had the air ride takin out n replaced with regular suspension but wen I lifted the car I noticed the air bags were still there n they had taken the pump out and there is also a nocking sound on the front driver side wen ever I hit a lil bump.. wat will I need to get to convert the rear suspension regular without the air ride or self leveling